hsakmt: openclose.c: Fix Coverity reported warnings

Add check before close to prevent closing invalid file descriptors

Change-Id: Ie1d50e0d55159512a14a70c1e4be058218aae668

libhsakmt/src/openclose.c

@@ -227,7 +227,8 @@ HSAKMT_STATUS HSAKMTAPI hsaKmtOpenKFD(void)
 	return result;
 topology_sysfs_failed:
 kfd_version_failed:
-	close(fd);
+	if (fd >= 0)
+		close(fd);
 open_failed:
 	pthread_mutex_unlock(&hsakmt_mutex);